The Keeping Up with the Kardashians star, 23, was sitting courtside at the Wells Fargo Center in Philadelphia, watching the Cleveland Cavaliers (Thompson’s team) play against the Philadelphia 76ers (Simmons’ team) when the two athletes were separated from each other in the fourth quarter of the game.

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Jenner was romantically linked to Simmons, 22, over the summer, while Thompson, 27, is dating her sister Khloé Kardashian and is the father to Jenner’s niece, True Thompson, 7 months.

Kendall Jenner

Mitchell Leff/Getty Images

According to Cavaliers Nation, the tension between Simmons and Thompson boiled over when Thompson made a free throw and “proceeded to taunt” Simmons. In response, Simmons seemingly gave the middle finger to Thompson.

Jenner, who was dressed in a black sweater and black pants, was at the game without her sister. She was photographed congratulating Thompson after his win, smiling after giving him a hug.

Their time together comes after Jenner spent Thanksgiving with the rest of her famous family in Palm Springs, California. Only Khloé missed the festivities, celebrating in Cleveland with Thompson and their daughter.

While Khloé continues to work through her emotions with Thompson, his relationship with her family is still frosty in the wake of his cheating scandal, according to a source. “Khloé’s family can’t stand Tristan,” said the insider. “They understand that Khloé wants True to spend time with Tristan and are supportive of that. There is not much love for Tristan any more.”

Still, it appeared Khloé was happy on Thanksgiving. She proudly showed off her holiday celebration on social media on Thursday, sharing a series of photos and videos of her Thanksgiving feast with Thompson at their home in Cleveland.

The NBA pro also posted a family shot. “I’m soo blessed,” he captioned the photo, which is the first he has posted on Instagram featuring the mom and dad with their baby. “Happy thanksgiving from my family to yours.”

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